If a source of frequency n crosses a stationary observer with uniform velocity v and if the velocity of sound `V gt gt v` , then the change in the frequency due to Doppler effect would be -

A source of frequency n is moving with a uniform velocity v towards a stationary observer. If the velocity of sound is V, then the change in frequency would be -

A source of sound crosses a stationary observer which is moving with uniform velocity v. If the velocity of sound in air is V, then the ratio of the apparent frequencies heard by the observer before and after the source crosses him would be -

When a source of frequency n is receding away from a stationary observer with velocity v, then the apparent change in frequency due to Doppler’s effect is found to be Delta n_(1) and when the observer is reducing from a stationary source with the same velocity v, then the apparent change in frequency is Delta n_(2) , then -

when a source of sound of frequency f crosses stationary observer with a speed v_(s) (lt lt speed of sound v) , the apparent change in frequency Δf is given by

when a source of sound of frequency f crosses stationary observer with a speed v_(s) (lt lt speed of sound v) , the apparent change in frequency Dealtaf is given by

If an observer moves towards a stationary source of sound with a velocity of one tenth the velocity of sound, then the apparent increase in frequency will be

If an observer is moving with uniform velocity v to wards a stationary source of frequency n, and if the velocity of sound in the medium is V, then the apparent change in the frequency of the sound, heard by the observer, is -

If an observer moving with velocity v crosses a stationary source of frequency n, then the change in the frequency would be -

If source and observer are moving towards each other with a velocity v_("radial") anf c indicates velocity of light, then, fractional change in frequency of light due to Doppler's effect will be